I made many changes to my pre-existing XD project yesterday (made it on Sunday) and hit ctrl+S many times while working on it. I opened it today and only the first change I made saved... Is there any way for me to recover the rest of my work?

In this case, we did release a Mac-only release earlier this week to fix a bug with not being able to save. However, this particular bug was platform specific, and shouldn't have affected Windows. Does this happen with new files, or does it happen after a little while?

It was my first ever XD file that this happened to. I created it and made the basic layout, saved, and didn't reopen the program until a few days later. I then made changes, hit save regularly while working on it, then closed the program. I opened it a couple days later and only the first change I made that day had saved.

I've been able to continue to work on the project incrementally, though! I've just been hitting save, shutting down the program, and reopening it every five minutes to make sure I didn't do too much work only to lose it all, haha.